Pervaporation of binary mixture of ethanol and water using a polyflux dialysis membrane

Date

5-2010

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Rex B. Demafelis

Committee Member

John Meynard M. Tengco, Marilyn C. Del Barrio

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Abstract

Pervaporation, a membrane-based alternative separation technology, was evaluated by concentrating dilute aqueous solutions of ethanol using a commercially available Polyflux® hollow-fiber dialysis membrane. The effects of temperature, feed concentration, and vacuum pressure were investigated in the permeate flux and selectivity of the membrane. The dialysis membrane was composed of inter-linked polymers which have been proven to be selective on ethanol. Results showed that hollow fiber dialysis membrane can concentrate dilute levels of ethanol up to 400% increase at vacuum pressure around 42 mbar, operating only at 30C. The increase in the temperature can improve the permeate flux, however, the presence of swelling of the membrane lowers the ethanol selectivity. The highest concentration produced was at 9% v/v of ethanol from an initial concentration of 2% v/v. Nonetheless, the inherent physical properties of the dialysis membrane become a limitation when subjected to higher operating conditions, reducing its service life and membrane performance.

Language

English

LC Subject

Ethanol, Diagnosis, Laboratory--Equipment and supplies

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2010 E62 B38

Document Type

Thesis

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